Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d80ed74259d5507…

MALICIOUS

PDF

41.4 KB Created: 2020-04-13 11:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e9f95648d1a1d45142cbaced4ae6b179 SHA-1: a8d983f207c1e18a0d152281b43c5ad91a7c226e SHA-256: 9d80ed74259d5507dc9abd4c23f508e7046b5ba678876c4fbaf52e2afc39a0de
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The primary attack pattern involves directing users to a link farm hosted on 'nessaolohanmusic.com' and other domains, which likely serves as a gateway to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://misjawees.com/uploads/1/3/0/2/130270907/130270907.html#formulacion+de+los+oxidos+metalicos
    • http://nessaolohanmusic.com/uploads/1/3/1/4/131437312/d1986f88e46.pdf
    • http://blockchaintradingllc.com/uploads/1/3/1/3/131379724/busalawuw.pdf
    • http://imperialyorkies.com/uploads/1/3/0/2/130288507/9bba1312565.pdf
    • http://aparkplaceforall.com/uploads/1/3/0/7/130775182/xovupobamiwurunipuxo.pdf
    • http://streetlevelart.com/uploads/1/3/1/3/131382430/gowegamurefatopawu.pdf
    • http://bedonetmarmaille.com/uploads/1/3/0/5/130550880/fufum.pdf
    • http://drafttracker.net/uploads/1/3/0/5/130543059/7475525.pdf
    • http://proesportscareers.com/uploads/1/3/1/1/131164311/dotesode-zizuw.pdf
    • http://bbdigitalphotography.com/uploads/1/3/0/6/130620521/xoraborunexu.pdf
    • http://skmarketing.com/uploads/1/3/0/6/130620965/nemumumevamaresi.pdf
    • http://europadesignsinc.com/uploads/1/3/0/5/130541662/wiwaloviraxisopab.pdf
    • http://bermudawellnessfestival.com/uploads/1/3/1/0/131070525/jizujavikasadumumat.pdf
    • http://chandlerbreeart.com/uploads/1/3/0/8/130874164/8303809.pdf
    • http://europadesigns
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d7c.bin
34aa851d1a81571889a2af1db19d3995e2ce81339ced3f96b8432d11e65298b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7C 8968 bytes
font_01_sfnt_off00008dd4.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD4 2652 bytes

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